Event:16 September | Carbon Removal Policy Summit
Climate Budgeting with CDR MeasuresSystem and Capacity Enablers

CLIMATE BUDGETING WITH CDR MEASURES

Lever last updated: 14 September 2026

Bringing climate targets, including CDR, into the annual public budget process.

Cost

Very low to Low

The government funds methodology, coordination, data and reporting within its budget process. Procurement, infrastructure or incentive programmes entered in the climate budget retain their separate costs.

Complexity

Low to Medium

A finance authority needs common accounting rules, departmental responsibilities, challenge and variance reporting. Existing budget systems help, while integration with inventories and independently verified removals adds work.

Timeline

Short

A government can formally begin through its budget instructions and publish a first climate budget in the next annual cycle, making departmental responsibilities and funded gaps visible within one to two years.

Integrity, Transparency & MRV

N/A

Innovation & Cost Reduction

N/A

Social & Environmental Safeguards

N/A

Energy, Transport & Storage Infrastructure

N/A

Inputs & Capacity

N/A

Demand Formation

N/A

Bankability and Cost of Capital

N/A

Policy Architecture & Coordination

2–4

Overview

Climate budgeting brings climate targets into the annual public budget. The finance authority sets an emissions pathway, lists funded and regulatory measures, assigns each measure to a responsible department and reports whether expected effects were delivered. For CDR, it can identify spending and policies for removal purchasing, land sinks, research or supporting infrastructure and show how they contribute to the government's plan. A statutory carbon budget sets an emissions limit over several years, while this lever connects climate delivery to annual spending and departmental accountability.

Key Considerations

The budget needs a defined emissions boundary, baseline, target pathway and method for estimating each measure's effect. Forecast reductions and removals need to remain separate from independently verified outcomes. Purchased credits, territorial sinks and removals outside the jurisdiction require distinct treatment so the same climate benefit is not counted twice. Finance officials need authority to challenge departmental estimates and require explanations for missed measures. Annual decisions also need to show future funding needs, since a one-year allocation cannot by itself sustain long-lived removal contracts or infrastructure.

Opportunities

Climate budgeting turns a climate plan into named annual decisions within the process that controls public money. It can reveal whether approved measures add up to the target, identify unfunded gaps and give legislatures a regular opportunity to scrutinise delivery. A clear budget line can also make planned CDR support more visible to departments and suppliers. These effects improve coordination and accountability, but the budget only changes removal activity when the listed procurement, investment or regulatory measures are implemented.

Risks

Optimistic assumptions can make an underfunded plan appear sufficient. Departments may count announcements rather than delivered measures, or substitute uncertain future removals for near-term emissions reductions. Territorial accounting can hide emissions shifted elsewhere. Annual revisions may repeatedly postpone difficult action, and a finance-led process can marginalise environmental or distributional concerns if it treats them only as budget variables.

Monitoring and Evaluation

Evaluation should compare approved measures, spending and implementation milestones with their forecast emissions and removal effects. Variances between forecasts, inventory results and verified removals can identify weak assumptions or delivery failures. Public explanations of changes to methods, responsibilities and future allocations should inform the next budget cycle.

Stakeholder Engagement

Finance and sector departments should agree which decisions, evidence and responsibilities enter the budget before estimates are fixed. Legislative and public scrutiny needs usable variance reports. Removal assumptions benefit from review by inventory experts and CDR suppliers, with affected communities able to examine who receives funding and who bears project impacts.

Governance Levels

NationalRegional / StateCity / Municipal

National, regional, state and municipal governments can each integrate climate measures into budgets they control. The finance authority at the relevant level can require departments to cost measures, estimate effects and report delivery. Several levels may align assumptions where their policies interact, but each can operate its own climate budget. Supranational and international bodies can promote common methods, while companies and philanthropy can use internal climate plans, but none controls the public budget at these levels.

Implementation Strategies

  • The finance authority should publish the emissions boundary, pathway and estimation method with the first budget.

  • Departments should receive named measures, delivery dates and responsibility for explaining material variances.

  • Removal forecasts should remain separate from verified delivery and from reductions occurring outside the jurisdiction.

  • Legislatures and audit bodies should use annual results to revise funding, responsibilities and assumptions for the next cycle.

Case Studies

Oslo’s climate budget.

Oslo developed its first climate budget in 2016 for the 2017 fiscal year and has since integrated the instrument into its annual budget process. The city assigns measures to municipal bodies and reports expected emissions effects alongside financial decisions. Its model made climate delivery part of ordinary administrative accountability rather than a separate environmental plan. Oslo remains the principal reference for this governance reform. The case is an emissions-reduction precedent. It shows where CDR measures could be budgeted, but does not demonstrate verified removals caused by the budget.

C40 Climate Budgeting Programme.

From September 2021 to December 2022, C40 and Oslo supported eleven cities in adapting climate budgeting to their own institutions through technical guidance and peer exchange. The completed pilot led C40 to expand its programme and publish a transferable framework. As an adjacent climate-governance analogue, the pilot demonstrates that the process can be adapted beyond Oslo without creating a new fiscal institution in every city. The programme spreads methods and capacity, however, while participating governments retain budget authority. Public reporting does not isolate emissions reductions or CDR outcomes caused by the pilot itself.

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©2026 Alexander Mäkelä and Carbon Gap.
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